.menu{
    width: 100%;
    height: 60px;
}
.menu ul {
    list-style: none;
    display: flex;
    padding: 0px;
    margin: 0px;
}
.menu ul li{
    width: 100px;
    height: 50px;
    background-color: gray;
    margin-right: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
}
.menu ul li.active{
    background-color: tomato;
}